Vacuum-cleaner attachment



4Aug. 9, 1927.

- `1,638,554 F. A. voos VACUUM CLEANER ATTACHMENT Filed July 3, 1924Patented Aug. e, 1927..

UNITED STATES PATENT OFFICE.

FREDERICK A. VOOS, OF NEWAB-K, NEW JERSEY, ASSIGNOR T WESTERN ELECTRICCOMPANY, INCORPORATED, OF NEW`YOBK, N. Y., A CORPORATION 0F NEW YORK.

VACUUhI-CLEANER ATTACHMENT.

Application mea my s, i924. serial no: 724,090.

This invention relates to vacuum cleaner attachments and moreparticularly to vacnum cleaner attachments for cleaning slotted surfaceswherein particles 'of metal or other matter collect and solidify. Theinventlon relates more specifically to a vacuum cleaner attachment forcleaning aslotted cylindrical surface such as an interrupter drum usedin automatic telephone exchange systems but it is to be understood thatthe invention in a modified form may be used for cleaning any surfacerequiring a combined brushing and suction action.

The object of the invention is to provide improved facilities forcleaning slotted surfaces and particularly the drums of electricalinterrupters.

This object is attained by the provision of a vacuum cleaner attachmentfor setting up a combined brushing and suction action, having a nozzlethe contact edge of which is shaped to conform to the general shape ofthe surface to be cleaned and a brush adjustably mounted within thenozzle adapted to be adjusted to variably p oject the brushing surfaceof the brush b yond the rimof the nozzle and to v`compensate for wear onthe brushing surface.

Fig. 1 is a longitudinal view partly in cross-section of the vacuumcleaner attachment attached to the hose of a vacuum cleaner with thenozzle -thereof applied to a slotted cylinder which` it is. desired p toclean.

` alongfthe lin'e2-j-2 of Fig. 1 showing the manner in which the brushis adjustably vheld -within the nozzle. y

Fig. 3 is a longitudinal view of a,modi

4o fied form of vacuum cleaner attachment .shown partly incross-section, for cleaning a atslotted surface. v j n l The attachmentconsists of a tube 4. of fibre or other insulating material, one end ofwhich is arranged to be tted over the hose' of a vacuum cleaner. Theother end knownV as the nozzle is Shaped so that its j contact 'edgeconforms to the "general shape of the surface to which the attachment isto be applied, as illustrated in Figure 1 or 3. Mounted within the tubeis a stud 8,

having one 'end threadedand reduced in Fig. 2 represents. a -crosssectional viewY cross-section and extending through a hole drilledthrough the wall of the tube. -A washer 9, Whose underside conforms tothe outer cylindrical surface of the tube is placed over the reduced endof the stud and a check nut 11 is then screwed on the threaded end ofthe stud for securely fastening the l threaded opening leading into thehole 12 into which opening a set screw 10 is screwed to press the brushhandle 6 against the surface of the hole 12.

When the attachment is to be employed in cleaning a cylindrical surface,the bristles of the brush 7 are trimmed to conform to the general shapeof the nozzle in order to prevent the bristles from being bent andbroken. In cleaning an object having a slotted surface such as theinterrupter drum 5, the brush is adjusted to project beyond the rim ofthe nozzle so as to enter ihto the slots as the nozzle is moved alongthe line of the slots 2 therein.

By unscrewing the set-screw 10, thereby loosening the brush handle 6,the brush may be adjusted. to brush out slots of various depths and.y tocompensate for wear on the bristles of the brush.

What is claimed is:

A vacuum cleaner for cleaning slotted interrupter drums comprising atube ofy insu-v lating material for attachment to the "hose of a vacuumcleaner, said tube having a contactV edge curved to fit the curve of thedrum to be cleaned, a brush axially mounted within said tube, projectingbeyond said contact edge, and means comprising a screw projectingthrough the side ofthe tube and enga lng 'the brush handle fordetermmmg' the distance the brush projects beyond the contact edge.-

In witness whereof, I 'hereunto subscribevl i 27th da of June,.A. D.l1924.

my name this FRED A. YOOS.

